42032112161 has 4 divisors (see below), whose sum is σ = 45265351572. Its totient is φ = 38798872752.

The previous prime is 42032112149. The next prime is 42032112203. The reversal of 42032112161 is 16121123024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5505640000 + 36526472161 = 74200^2 + 191119^2 .

It is a cyclic number.

It is not a de Polignac number, because 42032112161 - 2¹⁰ = 42032111137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42032112121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1616619686 + ... + 1616619711.

It is an arithmetic number, because the mean of its divisors is an integer number (11316337893).

Almost surely, 2^42032112161 is an apocalyptic number.

It is an amenable number.

42032112161 is a deficient number, since it is larger than the sum of its proper divisors (3233239411).

42032112161 is a wasteful number, since it uses less digits than its factorization.

42032112161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233239410.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 42032112161 its reverse (16121123024), we get a palindrome (58153235185).

The spelling of 42032112161 in words is "forty-two billion, thirty-two million, one hundred twelve thousand, one hundred sixty-one".